Originally Posted by MR_Pitkin:
“It can see the files ok it just won't play them. How do I find out the file system used by each USB stick?”
It might not be the file system. Having read the e-manual for the TV on the Samsung website it may well be able to read NTFS. In any case if it was unable to read NTFS it wouldn't even be able to list the files. Mind you just because it's in the e-maual doesn't mean it's true! The Samsung e-manuals are often about as useful as a chocolate teapot and may only vaguely describe the actual TV you own.
If you plug the USB stick into a computer and right click on the entry in the File Explorer and select Properties it should tell you what file system it is using on the General tab.
One question. When you copied the file over did you use the Eject function to close the USB stick down properly before removing it or just yank it out of the computer USB port regardless?
If you did just yank it out of the USB port without ejecting it properly then the file may be corrupt on the USB stick or may not even be there but just be an entry in the folder listing.
One way to check this is to try and play the file on your computer. If that works then at least you know the file is OK. If your computer cannot play it but can play the original on the 4GB stick then the copy is likely corrupt.